Dear Reader,
When I used Mathematica to solve a certain expression, the output was
extremely large, somewhere around 10 000 characters. When I looked more
closely at the output, I noticed certain frases kept repeating. I havent
found anything in the help, but Im wondering if there is a function that can
replace those frases with a variable and set that variable once. An example:
t-> -(y z-v x Cos[k]^2-v x Sin[k]^2)/(z^2-x^2 Cos[k]^2-x^2 Sin[k]^2)-1/2
\[Sqrt]((4 (y z-v x Cos[k]^2-v x Sin[k]^2) ........
becomes:
A = y z-v x Cos[k]^2-v x Sin[k]^2
B = z^2-x^2 Cos[k]^2-x^2 Sin[k]^2
t-> -A / B -1/2 \[Sqrt]((4 A ........
Thanks in advance, Bas
PS: just curious, is there a name for the proces I described above?